I have a pain in my lower back. i got it when i tried to lift a heavy water bottle. any advice for relieving the pain? thanks.

Back pain.: Rest / stretching / avoidance of heavy lifting and judicious use of medications including acetaminophen 650 mg up to 5 times / day or a non steroidal agent such as naproxen 500 mg twice a day. Can use these together if necessary. Other meds can help but would require prescription. Generally pain like this gets better within a few weeks.